import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "\\d{1,2}\\.\\d{1,2}\\.\\d{4}(?:\\s+\\d{1,2}:\\d{1,2})?";
final String string = "Hospitalization from 25.1.2018 to 26.1.2018\n"
+ "Date of hospitalization was from 28.8.2019 8:15\n"
+ "Date of arrival 30.6.2018 20:30 to hospital";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html